It may surprise nobody, but humans are internally conflicted, parts of our nature pulling in opposite directions: immediate gratification vs. longer term security. Or as Roman Krznaric and others have termed it, “marshmallow brain” vs. “acorn brain”. He describes how our “marshmallow brain” can’t resist eating the marshmallow in front of us even when forbearance would win us a second marshmallow, while our “acorn brain”...